Positives

• One patient discovered they were copper deficient, with levels significantly low, and after two weeks of supplementation, they felt “90% better” and regained a sense of normalcy in their life Reddit.
  
  

Negatives

• Patients on copper at higher doses commonly report abdominal pain, cramps, nausea, diarrhea and vomiting at doses above 10 mg/day, with toxicity risk rising further past 30 mg/day NIH ODS.
• Patients trying copper alongside zinc for COVID often run into the opposite problem of zinc-induced copper deficiency causing anemia and neuropathy, making isolated copper dosing tricky to balance Am J Medicine.

Hurdles & Side Effects

• One person experienced a wide range of symptoms for about three months before identifying copper deficiency as a potential cause, suggesting that diagnosis can be a complex process Reddit.